How many stars are there in the sky? 5. How many stars are there in the sky?

Countless ones, 6974 are visible to the naked eye.

There are as many stars as there is in the universe. The universe is infinite, so there are countless stars. The shining stars in the sky, like the sun, are just the reason for the distance. 6,974 stars are visible to the naked eye.

There are two main factors that determine whether people observe the stars as light or dark:

One is due to the magnitude of the star's ability to shine; The second is the distance between the stars and the people.

Astronomers usually divide the ability of stars to shine into 25 magnitudes, with the strongest ones being about 10 billion times different from the worst ones.

If we take the Earth as the center of the circle, and draw a spherical space with a radius of 13 billion light-years, there are about 125 billion galaxies that have been discovered and observed, and each galaxy has hundreds to trillions of stars like the sun. Some of them can be seen with the naked eye, and some of them can be barely seen with sophisticated technology"Stars"Right? But how big is the universe?

Normally, a sighted person can see about 6,000 stars on the entire celestial sphere without the help of any optical instruments.

On March 22, 2003, at the 25th General Meeting of the International Astronomical Union held in Sydney, Australia, an astronomical team composed of British and Australian astronomers, using advanced instruments in the Sedin Springs Observatory in New South Wales, Australia, accurately estimated that the total number of "70,000,000,000,000,000,000,000,000,000,000,000" in the currently visible universe was "70,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,00"7 10 to the 22nd power" of stars, this number is estimated to be more than the total number of sand grains on all beaches and deserts on Earth, but this is still the total number of all stars within reach of telescopes at present, and the actual number, astronomers believe is much larger than that, but it is beyond our reach at the moment, so humanity has solved it in a very efficient word:"No discussion! "

In 1989, the European Space Agency (ESA) sent a space telescope called Hipparcos into low-Earth orbit to compile a star map of our Milky Way, which counted more than 2.5 million stars in our Milky Way over a four-year period. The European Space Agency plans to launch a new GAIA space telescope by 2012, which will continue the work of the Hipparcos space telescope, which scientists expect will count the number of stars in the Milky Way to 1 billion. Although astronomers estimate that there are about 100 billion stars in our galaxy, there are as many as a few million galaxies in the universe.

Hope you are satisfied.

Countless ones, how like a brain teaser.

Not during the day, countless at night.

That guy is too much gone, and he's getting older.

How many stars are in the sky.

People always say that there are too many stars in the sky, but in fact, all the stars that can be seen with the naked eye can still be counted. Astronomers divide the stars in the sky into 88 constellations according to their regions. Among them, the northern sky (bounded by the celestial equator) has 29 constellations; There are 46 constellations in the southern sky and 13 constellations in the north and south of the celestial equator.

As long as we have patience and count the stars in one constellation, we can count the stars that can be seen with the naked eye. According to the calculations of astronomers: 6 stars of magnitude 0; 14 stars of 1st magnitude; 46 stars of 2nd magnitude; 134 stars of 3rd magnitude; 458 stars of 4th magnitude; 1476 stars of 5th magnitude; 4,840 ...... of 6th magnitudeNo more than 7,000 in total.

If we use a telescope, the situation is different, and even with a small astronomical telescope, more than 50,000 stars can be seen. The largest modern astronomical telescope can see more than 1 billion stars. In fact, the number of stars in the sky is much more than that.

The universe is endless, and what modern astronomers see is nothing more than a tiny, tiny part of the universe.

How much do you know about the starry sky.

About 3 after 23 zeros.

Peter of the American astronomer at Yale University. Fan. Dokun and Charlie, an astrophysicist at Harvard University. Conroy analyzed the intensity of light from galaxies and concluded that there were far more red dwarfs in galaxies than previously thought.

Previously, astronomers estimated that the number of stars in galaxies was about a trillion times that of 100 billion.

Fan. After observing distant galaxies in Hawaii with the help of electron astronomical telescopes, Dokun and his team found that the stars of these distant galaxies were many times or even dozens of times larger than previously thought, and that the size of 3 was followed by 23 zeros. For the sake of the image, Conroy said that there are about 50 trillion human cells in each person and about 6 billion people on the earth, and the product of the two is exactly 3 followed by 23 zeros.

In other words, the stars in the sky are comparable to the total number of human cells on earth.

There are only more than 3,000 stars that can be seen with the naked eye, which is already a very good observation condition, and as for how many stars there are, no one dares to give a definite number

The secrets of the universe are found in the quantum, and the problems of the quantum are found in the 21st century, and perhaps the number of stars is in the quantum.

As for the fact that there are 23 zeros after 3, in fact, there are tens of trillions of galaxies found in the universe, and each galaxy has hundreds of billions of stars. The light emitted 15 billion light-years ago has not yet been picked up by radio telescopes on Earth, so we don't know what is 15 billion light-years away.

Stars themselves are evolving, some are coming, forming, and some are dying. The stars of the universe are also dominated by the dark matter in the universe, so the number of stars is not constant, red dwarfs are the most stable in the stellar calendar, there are about 3 10 23 in the universe, and only 6000 can be observed by the naked eye.

As much dust as there is on the ground.

According to rough estimates, there are about 200 billion stars in the Milky Way, plus extragalactic galaxies, so it is often said that "there are countless stars in the sky".

There will be no definite answer to this question. There are three main reasons for this.

First, what kind of celestial bodies can be called "stars"? What is a celestial body? "The material form of cosmic space.

Is there no lower limit to the size of this celestial body, and does a stone floating in the universe count? What about that one gas molecule? This is not easy to define clearly.

The first one is a question of artificial definition, but the latter is a question of scientific level.

Second, there is no way for humans to observe the entire universe. Now that the universe is only 13.7 billion light-years away, is this a complete universe? Definitely not, how big is the universe, I don't know?

Is the overall density of the universe the same as the overall density of the universe that we have observed? When we don't know how big Africa is, how many trees there are in Africa? In the same way, if you don't know how big the universe is, can you know how many stars there are in the universe?

Moreover, with the current conditions, it is not possible for human beings to detect all the celestial bodies in the solar system. I don't know if Lou has heard the following forecast: "XX time, XX place, a meteor of XX brightness can be seen in XX direction"? Absolutely impossible, because meteoroids are completely undetectable under current conditions (the size of sesame mung beans).

If this is already the case in the solar system, how much less the entire universe?

Generally speaking, people can see 6th magnitude stars with the naked eye, and the number of stars in the whole day is about 6,000, and obviously this number will vary greatly depending on the eyesight of each person. In addition, the number of stars seen in a place varies according to the geographical latitude, people in the equatorial region can see the stars all day in one night, and the higher the geographical latitude, the fewer stars they see.

I found it specifically from the Astronomy Enthusiast's Handbook.

There are about 7 by 10 stars to the 22nd power in the universe. This figure was calculated by Professor Simon Driver and his team at the Australian National University's Institute of Astronomy and Astrophysics.

Using the world's most advanced radio telescope, Professor Simon Driver and his team first calculated how many galaxies there were in a space closer to Earth. Then, by measuring the brightness of the galaxies, it is possible to estimate how many stars there are in each galaxy. Next, based on this number, we can deduce how many stars there are in the visible universe.

Experts believe that this is the most advanced calculation method to date.

While the international astronomical community spoke highly of the results of this research, Professor Simon Driver said: The 22nd power of stars of 7 times 10 is not the number of stars in the entire universe, but a relatively accurate number calculated within the reach of modern telescopes, and the real number will be much larger than this.

To calculate the number of stars in the sky, it remains to be worked by future generations This **is the Milky Way**, those bright spots are stars, and there are many, many more outside the Milky Way.

There are more stars than there are grains of sand in the Sahara Desert.

The exact number is still a mystery.

More than 6,000 stars can be seen with the naked eye.

In total, there are more than 200 billion stars in the Milky Way.

Except for the moon, which is a moon, Venus, Jupiter, Saturn, etc., which are planets, most of them are stars.

The universe is endless. Modern astronomers can see only a small part of the universe. How many huge galaxies there are in the universe, no one knows.

No more than 7,000 stars can be counted that can be seen with the naked eye. (can be ignored).

About 8,000 stars can be seen on the Earth, and there are n stars in the universe.

Theoretically, it's 100 billion times 200 billion – 100 billion known galaxies, each with about 200 billion stars (stars).

There are countless of them, and I can't count them in a lifetime.

There are more than 6,300 of them that can be seen by the eye.

Many people love to ask this question, and netizens also answer a variety of questions. Now look at the 2005 Ningbo High School Examination question: "There are several stars in the sky, 7 followed by 22 zeros" This is the news announced at the International Astronomical Union. ...(I don't need to say more!) ）

Many, much more. Yes, no, don't tell me it's not right Be honest, what I know is not a numerical answer ,

You have as many stars as you have hairs (note the exact number).

To put it literally, there is as much sand and gravel as the Gobi Desert. To put it scientifically, it's the same as the content copied from the Internet by the previous ones.

I don't know, because we're still discovering it.